Looking for name of certain song?

I'm sorry people my piece of shit computer is acting up so sorry for writing this twice.I was just wondering if anyone remembers a song that Luther Vandross,Gloria Estefan,and a number of other singers sung in the early 90's for charity.I used to love this song it was my favorite and had such a positive message.I can't remember it now though or even who sung it except Vandross Estefan is just a guess.The song was sung for charity back in the early 90's and was consistently on the radio playing over and over.If this helps at all I think one of the lyrics was light in the window.No not the country song I saw a light in your window tonight.If anyone can find out or knows please fill me in.I have been wanting to find it on YouTube but until I even know what it's called I can't do that.:wink: